Pulley mechanism.



' C. R. PI'EPER.

PULLEY MECHANISM.

APPLICATION HLED JAN. 11. 1915.

Patented July 17, 1917.

j CHESTER a. rinrnator LA cnossE, Wiscons n.

To all whom it may concern: a

4 Be it known that I, CHESTER R, PIEPER, citizen of the -United States,M residing at La Crosse, in the county of La Grosse and new and usefulImprovement in Pulley -Mechanism, of which, the following is a full,clear, concise, and exact description, reference being had to theaccompanying drawings, forming. a part of this specification.

My invention relates to apparatus for support-ing energytranslatingdevices and includes the cord'or string by which atranslatingdeviceis supplied with energy which with pulleys, and asupplemental supportingdevice whereby the vertical position of thetranslating device may readily be varied and adjusted.

The apparatus of my invention is of particular service in the sup-portof incandescent lamps, current conducting cord being employed forfurnishing the lamps with electrio current and entering into thefunction of supporting the lamps.

My invention has as another of its char .acteristics the improvedformationof a pulley housing or support having several novel and usefulcharacteristics.

I willfexplain my invention more fully by reference to the accompanyingdrawing showing the preferred embodiment thereof and in which Figure 1is a side elevation illustratin the preferred form of one adaptation omy invention; Fig. 2 is r a view of one of the pulleys on line 2 2 ofFig. 1; Fig. 3 is a view on line 3 3 of Fig. 2; and Figs. 4 and 5 aredetail views.

Like parts are indicated by similar characters of reference throughoutthe different figures. V

The incandescent lamp 1 is of the drop- .light variety, the lamp beingcarried by and included in circuit by means of the usual 45 pendantdouble cord 2 which is suitably anchored to the ceiling or other mainsupport within a rosette 3, in accordance with common practice. The cordwhere adjacent the ceiling is returned uponitself to constitute a loopin the bight of which a floating pulley 4 is received, this pulley beingsulta 1y weighted to approximate the weight of the lamp and its shadewhereby the pul ley 4 will descend when the lamp 1 is elevated, and willhold the lamp when brought Specification of Letters Patent.

State of Wisconsin, have invented a certain itis to translate, operatingin COIljllIlClilOIi PULLEY MECHANISM.

Patented July 17, 1917.

Application filed January 11, 1915. Serial No. 1,677.

7 to desired vertical adjustment. The loop,

whose sides are thus changeable in length and whose bight is thuschangeable in loca- 1 tion inorder that thelamp may be support ed in tsvarious positions of vertical adjustment, is maintained by means of alight or unweighted non-floating pulley 5 whose housing 6 is attached tothe ceiling inde-.

pendently of the cord 2, rather than with the aid thereof as hitherto.The means by which the housing 6 of the pulley 5 is supported desirablyincludes a hook secured to the ceiling or other uppermost and mainsupport at the rosette 3. .The hook 7 receives the eye 8 at the upperend of a link 9 whose lower endterminates in a hooklO that receivesthestaple eye 11 upon the upper part of .the housing 6.

By this arrangement the weight of the Weighted pulley 4 is dividedbetween the portion of the current conducting cord 2 attached to theceiling and the link 9 in stead ofbeing borne altogether by this portionof the current conducting cord, as.

hitherto. Furthermore the weight of the lamp and its shade is not borneby this up per portion of the cord but is borne by the link 9 and thepulley 5 intervening between the link 9 andthe lower stretch of thecord.

A rosette anchoring screw 12 also desirably passes through the stem ofthe hook 7 in order that this hook may be mounted in the desired. place.The hook and link enable the upper pulley 5 to swivel so that itmay bedrawn invarious directions and bodily turn to rotate on its aXis withoutany undesirable side strain. When this pulley r is released from anyside thrusts or pulls it will readily return to its normal position. Theelements 7 8, 9, 10 and 11 thus constitute a flexible support for theupper pulley 5 whereby it may be mounted upon the ceiling or other mainsupport in a manner to permit its position to be changed as desired.

The housings for the pulleys 4 and 5 desirably are of similar formationeach being preferably of hollow globular shape, the lower and floatingpulley housing 13 carrying iron slugs 14 in order that this pulley maybe weighted, while the housing 6 for the upper and non-floating pulleyis free of such slugs as this pulley serves to define the loop thatholds the floating pulley 4 and therefore does not have to exert anycounterbalancing effectto offset the weight of the bottom by lamp andits shade. While the cord 2, herein shown, serves to convey energy inthe form of electric current to a translating device in the form of anincandescent lamp, I do not wish to be limited to the form of energythat the cord is nor to the nature of the translating device which thecord supports at its lower end.

I Will now describe the improved formation of housing which ispreferably employed in connection with each of the lower andupperpulleys 4 and 5. Each globular housing preferably includes two thinhemispherical metallic shells 15 which are united atthe top by thestaple eye 11 and at the the staple 16. The hemispheric shells areprovided with recesses 17, the recesses in each shell being symmetricalwith respect to the recesses in the other whereby passages are affordedto permit of the travel of the cord 2 through the globular housing. Thelong edgesof the recesses 17 constitute seats for diaphragm's 18 whichare formed in a pair, the diaphragms being united by a yoke 19integrally formed there with; The yoke is secured in relation to thehemispheric shells by the staple 11. The diaphragms are, the shells butproject beyond the same at the recesses 17, the

diaphragms at the recesses 17 being bent over to constitute lips 20. Apulley shaft 21 projects through flanged holes in the diaphragms for-thesupport of the housed pule ley, the portion of the shaft intermediatethe diaphragms being larger than these holes to have end engagement withthe diaphragms and being of such length .as to constitute a distancepreserver to maintain the diaphragms snugly upon their seats at therecesses .17. The shaft 21 is dropped suflic'iently to afford ampleclearance between the groove of the pulley and the upper Copies of thispatent has be obtained for fivee'e'nt s; each, by

adapted to convey in the main, surrounded by projecting portions ofthese I portion of the housing for the passage of the cord.

. While I have herein shown and particularly described the preferredembodiment of my invention I do not wish to be limited to the precisedetails of construction shown as changes may readily be made withoutdeparting from the spirit of my invention, but having thus described myinvention I claim as new and desire to secure by Letters Patent thefollowing 1. A pulley structure including a pulley; and a housingtherefor formed of two shells, a diaphragm seated upon each of theshells .upon and between which diaphragms the pulley is mounted, thepulley having a distance preserving portion intervening between thediaphragms to maintain the diaphragms in engagement with the shells.

2. A pulley structure including a pulley; and a housing therefor formedof two shells, a diaphragm seated upon each of the shells upon andbetween which diaphrag'ms the pulley is mounted, the pulley having adistance preserving shaft portion intervening between the diaphragms tomaintain the diaphragms in engagement with the shells.

3. A pulley structure including a pulley; a housing therefor formed oftwo shells, a diaphragm seated upon each of the shells upon and betweenwhich diaphragms the pulley is mounted; and a distance preservingportion intervening between the diaphragms to maintain the diaphragms inengagement with the shells.

In witness whereof, I hereunto subscribe my name this fourth day ofDecember A. D., 1914.

CHESTER R. PIEPER.

Witnesses:

H. H. Lone, FRED L. STRAUSS.

aadressmg the commissioner of Patents.

Washington, 1). 'c."

